Paul Karason, or Papa Smurf, was born a fair-skinned, freckled boy with reddish blond hair. But in his 40s, he developed skin with a bluish tinge, as a result of using dietary supplements that contain colloidal silver in an attempt to treat recurring health problems. He did that in response to certain ads in new-age magazine that promise health and rejuvenation. Paul died of pneumonia at age of 62. (Source)